MMBT3904 MMBT3904LT1 1AM Voltage Regulator Chip for Bitmain PSU APW3 APW7
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Upgrade Your Power Supply with the Efficient and Reliable MMBT3904 1AM Transistor
Take your power supply to the next level with the MMBT3904 1AM SOT23 Transistor. This voltage regulator chip is designed to provide efficient and reliable power to your electronic circuits, ensuring consistent performance and enhanced maintenance.
Experience Consistent Power with the MMBT3904 1AM Voltage Regulator
The MMBT3904 1AM features top-of-the-line plastic and electronic components, offering comprehensive protection against environmental factors. Its surface-mount technology ensures a lead-free and RoHS-compliant electronic component, promoting sustainability and compliance with industry standards.
MMBT3904 Technical Features:
| Feature | Specification |
|---|---|
| Transistor Type | NPN |
| Current Capacity | Up to 200mA |
| Vceo | 40V |
| HFE (Current Gain) | 100-300 |
| Package | SOT23 |
| Lead-Free/RoHS Compliance | Yes |
| Quantity in Package | 350 (+/- 2%) transistors |
Common failure symptoms
- Status LED or opto-coupler driver stuck in one state
- PSU supervisor not communicating with the main controller
- Burn or cracked package at a SOT23 position around the standby section
- Standby rail loaded down by a shorted MMBT3904
- PSU fault flag stuck active even after correcting the upstream issue
Frequently asked questions
Is 1AM the same as MMBT3904?
Yes — 1AM is the standard on-package marking for the MMBT3904 NPN transistor in SOT23.
Can I substitute a 2N3904 in place of the MMBT3904?
Electrically very similar, but the 2N3904 is a TO-92 through-hole part. For the SOT23 SMD slot on a Bitmain APW3/APW7 board, use the MMBT3904.
What is the typical use on APW7?
Status LED drive, opto-coupler drive, level-shift on the supervisor link and generic small-signal switching around the standby supply.
Do you stock matching small-signal parts?
Yes — see 2SC1008 EY NPN, T2N7002AK MOSFET and TL432A shunt regulator in related products.
Related products
- 2SC1008 EY NPN Transistor SOT23
- T2N7002AK NJ N-Channel MOSFET SOT-23-3
- TL432A T4A3 Adjustable Shunt Regulator
- 25V 220µF Aluminum Electrolytic Capacitor for APW3++
Contact contact@lys-sz.com for volume pricing or compatibility questions.
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